Drier.



R. DE C. GREENE.

DRIER.

APPLIUATIUN FILED Patented Sept. 24, 1912.

3 SHEETS-SHEET 14 at Greene:

@ably/@av It. DE C. GREENE.

DRIER.

APPLICATION FILED SEPT,

Patented Sept. 24, 1912.

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R. DE C. GREENE.

DRIER.

APPLIGANON FILED SEPT.11.1Q11.

1,039,385. Patented Sept. 24, L912.

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SH01/muta RUSSELL DE C: GREENE, OF NICHOLS, FLORIDA.

DRIER,

Specification of Letters Patent.

Patented Sept. 24, 1912.

Application tiled September 11, 1911. i .Serial No. 648,604.

Toallwhom it may concern l Y Be it known that I, RUSSELL DE C. GREENE, a citizen of the United States, ,residing at Nichols, in the county of Polk, State of Florida, have'invented certain new and use- ,ullmprovements in Driers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such*` as will enable -others skilled in the art to` which it appertains to make and use` the same.l

My invention relates to new and useful improvements in driers for use in drying phosphate rock, ore, cement or the like, and the objectvofiny invention is to improve the construction and increase the efliciency of driers of the above described character.

A further object of my invention is to4 provide a drier consisting of an outer cyliner, an inner cylinder revolubly mounted within the outer cylinder, means for passing the hot gases from a furnace through said cylindersand means for passing the ock or ore to be dried through said cyliners. v A further object of my invention is to provide means whereby the rock k"passes first through the outer cylinder and then back through the inner cylinder while the gases pass first through the inner cylinder and then through the outer cylinder.

vlllith these and other objects in View, my invention will be more fully described, illustrated in the drawings which show a preferred embodiment of my drier, and then specifically pointed out in the claims which are attached tojand form a part of this application.

In'the accompanying drawings, Figure 1 is a side elevation of my improved drier. Fig. 2 is a central longitudinal section of vthe same, the inner cylinder being shown in elevation. Fig. 3 is a similar View showing the inner cylinder in section. Fig. 4 is a `transverse section on the line LA of Fig. 1. 'Fig 5 is a transverse section in thc line 5-5 of Fig. l. Fi 6 is an end elevation looking toward the 'ui-nace. Fig. 7 is a detail plan view of the mechanism for rotating the inner cylinder, the drier being reniovcd to better show the parts.

Referrin more specifically to the. drawings, in w ich similar referenccnunierals designate corresponding parts throughout, my limproved drier will be seen to consist primarily of a furnace ,1, an inner cylinder i 2 and an outer cylinder 3, the inner cylinder being mounted for rotation within the outer cylinder as will be hereinafter fully explained.

The furnace as shown, is of the conventional forin having the grate bars 4 and fireback 5 and the back wall of the furnace is provided with a'circular opening 6 into which is extended the flared end 7 of the inner cylinder and as will be readily understood the heated gases from the furnace will pass through the end A7 into this cylinder. This inner cylinder is preferably constructed of boiler plate or other sheet metal suitable of undergoing the intense heat to which it will be subjected andthe flared end of this cylinder is preferably formed with a slip joint including an inwardly extending `annular flange 7 loosely fitted in the boiler opening and which coacts with an outwardly extending annular flange 7 fixedly secured to the flared end. It will be understood that the flange 7 is not attached to either the outer cylinder or the furnace in any manner but is free to revolve or move backward or forward. Surrounding this inner cylinder adjacent each end are bearing lshaft 13 which extends between one of the pairs of rollers and which is provided at one end with a pinion 14 which meshes with a gear 15 which is secured to and surrounds the cylinder 2 adjacent onc of its bearing rings. lpon the other end of this shaft is keyed a bevel gear 16 which meshes with a bevel gear 17 carried by a shaft 18 which latter shaft, is adapted to be driven by any suitable engine not shown.

From the above description it will be seen that, the cylinder 2 is so mounted that it may be readily revolved and may therefore be adapted to serve as a conveyer of the helical screw type. To adapt it for this purpose the cylinder 2 is internally wound with a plurality of spacedapart strips of' Z or angle iron 19, one side of these strips being firmly riveted or otherwise secured to the shell or cylinder while the other side extends inwardly to engage the rock, these strips being so wound as to form a helical screw adapted to convey the rocks from the viso from which they are discharged through a chute 2() upon a suitable form of convey-er notshown.' In order to prevent the rock` 5 from remaining in the lower part of the-CyL inder 2 during its above described lprogress therethrough I have provided the-cylinder with a plurality of spaced apart, longitudinally and inwardly extending ribs or steps 21', which asbest shown in Fig.'3 of the drawings, are interposed between conveyer threads '19. As will be readily understood Vthea-eck is engaged by thesesteps and is thus carried around the cylinder aswell as through the same. i 'i A,

The outerrend of the cylinder 2 is closed by a wall 22, preferably formed vof sheet metal and secured to this wall and to the cylinder is a centrally positioned, longitudinally extending partition member 23 and a second `partition member 24, which members' intersect each other at. right angles as shown. These members extend inwardly but a slight distance and form a trap to prevent the escapeof the rock as it is being fed to Athe innerl cylinder as will be hereinafter described. -As shown the'angle irons 19 terminate just short of the inner ends of this trap' and as a means for feedin the rock to such a point in the cylinder t at it will be acted upon by the conveyer the faces of the partition wall are provided with the Z or L-shapedstrips'25 which as shown, converge toward each other inwardly, to form chutes through which the rock passes. The outer end ofthe lcylinderis provided adjacent .thewall A22 with slots or openings 26 positioned-one within each of the sections formed bythe partition members and these 40 slotsv forma means of escape'forthe gases passing through the cylinder from the furnace and also a means for the inward passage of the rock or ore from t-,heouter cylinder 3, said rock being lifted upv and thrown through the slot by means of buckets 27 secured to the outer face of the cylinder 2, one adjacentgeach of the slots. These slots are preferably formed by forming U-shaped -clef'ts in the cylinder and bending the tongu'es thus formed inwardly to form inl wardly directed anges which prevent the rock from falling back through the slots as the cylinder revolves. If desired however the slots may be formed by entirely removing portions ofthe metal and suitable baie plates may be secured within the cylinder to prevent the escape of the rock.

The outer cylinder 3 as shown, is so proportioned as t`o form an annular space beerably formed of sheet metal in the same manner as is 'the inner cylinder, but may be constructed of brick or other preferred material if desired. This outer cylinder is supported. at. suitable intervals -by means of yangle irons 35, which are secu tween it and the innerfcylinder and is pref-v brackets 28 which are .boltedoriotherwisef secured to the base lf( Theends of thsff:

outer cylinder are provided with .inwardly` if extending annular flanges 29= which co-.act"' with outwardly extendiixgannular' flanges,y 30 carried by the innervcylindertogforniga slip joint by means of which all escape'of" rock or gases from between vthe cylindersfis prevented while at the same time the-'L "inner l cylinder is free to revolve within 'theoutercylinder. That end of` theouterf cylinder adjacent the furnace is provided with any@ suitable formof .feediho 'per through whiclij'".` therock or crema be the drier b el` tween the inner an outer cylinders and end is also provided withan exhaust port or ports 32 rpm which eXtendSEan-'exlhfaust pipe 33 the' other end ofwhch cOniYiuni-- Y cate's with the inlet port of an exha fan f l 34 by means of which the gases ar out of the drier. A

The outer face ofi the cylinder vided with a plurality of Spi i V? .theylinder by rivets or other preferred means'iiii'd 90 which as shown, are woundlfiii the opposte;\. direction to that in which t -jangle 19s: withinv the cylinder a wound 'andf'are'lg therefore adapted toco .ey the rockin f opposite direction.` 95

' The inner cylinderfis'externally provid with steps of'Z or ingle iron materialw 6" arranged parallel to'itheaxis of the cylinder and interposed between the conveyer threads 35 in order to prevent the rock from reiiain- 100 ing in the lowerv part of theannular space between the cylinders.

From the foregoing descriptio" eration of the drier will be app y' rock orv substance to be driedi "ffed tothe outer cylinder by means of thefhopper 31, y the inner cylinder being rot-ated meanwhile andfis conveyed to'the outer end ofthe outer cylinder where it is picked up by the buckets 27 and passed through the slots ,3l into the inner cylinder through which it fili-'asses and from which it is dischargedinto the chuteQO. rI"he heated gases V*from 'the furnace in the meantime pass in through. the flared end of the inner'cylinder, through* the slots 26 to the outer cylinder and through the outer cylinder from which it is drawn by means of the exhaust fan. It will :thus be seen that the ore is fed to that .portion of the drier which is coolest and that as it passes' Ythrough the drier and is thusjgradually dried t-is continually being brought to a hotter portion of the drier until finally it reaches the liared end of the inner cylinder which is thef hottest portion of thev drier. By this means the drying actionV is gradual and uniform and this gr 'fgdrying together with the fact that the "revolving of the inner cylinder keeps the lorc continually in motion, prevents it from being baked to the walls of the cylinders and thus clogging the machine.-

What I claim is:-

l. A drier, comprising a furnace, a cylinder rotatably mounted and with one end communicating with said furnace, a second cylinder surrounding the first cylinder, means for supplying the material to be dried to that end of the outer cylinder adjacent the furnace, means for conveying said material through the oiiter cylinder, means for passing said material into that end of the inner cylinder farthest from the furnace, means for conveying the material through the inner cylinder, means for dischargin the material from the furnace end of sai inner cylinder, and means for rotating said inner cylinder.

2. In a drier, the combination with a furnace having an opening in its back wall, of an outer cylinder, an inner cylinder extending through said outer cylinder and revoluble therein, said inner cylinder having one end in communication with the opening in the back of the furnace, means for revolving said inner cylinder, means for supplying the material to be dried to the outer cylinder, and means whereby the revolving of the inner cylinder will cause said material to be conveyed through the outer cylinder in one direction and back through the inner cylinder in the opposite direction.

3. A drier, comprising an outer cylinder, an inner cylinder extending through said outer cylinder and revoluble therein, means for passing heated gases through said inner cylinder ,in one direction and back through the outer cylinder in the other direction, and means for passing the material to be dried through the outer cylinder in one direction and back through the inner cylinder in the other direction, the direction of travel of the gases and material at all times being opposite.

4. A drier, comprising a, furnace, a cylinder rotatably mounted with one end communicating with said furnace, a second cylinder surrounding the first cylinder, means for supplying the material to be dried to that end of the outer cylinder adjacent the furnace, outwardly extending spirally wound Conveyer members secured to the outer face of the inner cylinder and adapted to convey said material through the outer cylinder, means for passing said material from the outer cylinder into the inner cylinder, means for conveying the materlal through the inner cylinder, means for diS- charging the material from the inner cylinder, and means for rotating the inner cylinder.

5. A drier, comprising a furnace, a. cylinder with one end communicating with said furnace, a second cylinder surrounding the first cylinder, means for rotating the first cylinder, an exhaust port in the second cylinder, an exhaust fan, communicating means between said port and fan, a supply hopper adjacent said exhaust port, spirally wound conveyer members secured to the outer face of said first mentioned cylinders, the outer end of said first mentioned cylinder being slotted, buckets carried by said first mentioned cylinder and adapted to discharge through said slots, longitudinally extending partition walls positioned in the slotted end of said cylinder, spirally wound conveyer members carried by the inner face of the first mentioned cylinder, said members being wound in the opposite direction to the first mentioned members, and longitudinally extending spaced apart steps positioned between said members.

In testimony whereof, I aflix my signature, in presence of two witnesses.

RUSSELL DE C. GREENE.

Witnesses:

L. W. CLAYTON, A. E. KoERNER. 

